Denisov, AndreySoto, Marcelo A.Thévenaz, Luc2014-06-102014-06-102014-06-10201410.1117/12.2071272https://infoscience.epfl.ch/handle/20.500.14299/104147The challenge to resolve a record of one million points along a single optical fibre is demonstrated using a Brillouin distributed fibre sensor. The proposed system is based on a phase-correlation technique combined with a temporal pump gating, making possible to detect a 14 mm-long hot-spot located at the end of a 17.5 km-long fibre. This corresponds to an increase by one order of magnitude in the number of points that a single system has resolved, representing a major breakthrough in the field. Specific issues arising when resolving such a large number of points are discussed.text::conference output::conference proceedings::conference paper